| (19) |
 |
|
(11) |
EP 0 220 965 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
14.02.1990 Bulletin 1990/07 |
| (43) |
Date of publication A2: |
|
06.05.1987 Bulletin 1987/19 |
| (22) |
Date of filing: 30.10.1986 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB NL |
| (30) |
Priority: |
30.10.1985 JP 243593/85
|
| (71) |
Applicant: Nippon Paint Co., Ltd. |
|
Osaka-shi
Osaka-fu (JP) |
|
| (72) |
Inventors: |
|
- Yamamori, Naokiä9-201, 1130 Aomatani
Minoo-shi
Osaka-fu (JP)
- Ohsugi, Hiroharu
Suita-shi
Osaka-fu (JP)
- Eguchi, Yoshuo
Ikeda-shi
Osaka-fu (JP)
- Yokoi, Junji
Ikoma-shi
Nara-ken (JP)
|
| (74) |
Representative: Whalley, Kevin |
|
MARKS & CLERK,
57-60 Lincoln's Inn Fields
London WC2A 3LS
London WC2A 3LS (GB) |
|
| |
|
| (54) |
Resinous composition capable of releasing a bioactive substance at a controlled rate |
(57) A bioactive substance control-releasing resinous composition comprising a resin having
main chain and side chains, at least one side chain bearing at the end portion thereof
an organic acid moiety having a biological activity through a metal ester bonding.
The resin is hydrolyzed in an ionic atmosphere at a controlled rate to generate a
bioactive substance as well as metal ions and is useful in various field and especially
as resinous vehicle of coating composition.